Question $12$

Select all input combinations that are a valid input for a $42$ encoder:

$0000$

$0001$

$0010$

$0011$

$0100$

$0101$

$0110$

$0111$

$1000$

$1001$

$1010$

$1011$

$1100$

$1101$

$1110$

$1111$